Furnace



Feb. 17. 1925. 1,526,922

. V. M KAY FURNACE Filed June 19, 1920 ,3 Sheets-Sheet 1 V. MacK Feb. 1 7.- 1925.

FURNACE 3 Sheets-Shem z;

' Filed June 19 Feb. 17. 1925. 1,526,922

, V. M KAY FURNACE Filed June 19, 1920 5 Shee'ts-Sheet' s Patented Feb. 17, 1925.

UNITED ST ATT-ES VASIL MAGKAY, OF WASHINGTON, DISTRICT OF COLUMBIA.

FURNACE.

Application. filed June 19,

Toall whom it may concern: 7

Be it known that I, VAsiLhLwKAr, citi- Zen of the United States, residing at VVa-Shington, in the District of Columbia, have invented certain new and useful Improve ments in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawing.

The present invention. relates to stoker grates of the front feeder type and to the extent that-the subject matter is common to the two cases, this application. is to be regarded as acontinuation of my'application, Serial No. 336,442, filed: November 7, 1919, entitled Mechanical st'olzing grate support.

In the present case, as also in the application to'whichl havealluded, thQCUStOHlELI'y dead iplate located forwardly of the furnace is obviated, andmovable feeding grate members are locatedto bring the forward edges thereof immediately adjacent tothe fuelreceivingopeningof-the lire chamber to better facilitate the feeding of the fuel rearwardly over the grate:

In thesecases also I have been-enabled to eliminatediividing walls in the front plate of the furnace so that a continuous or unbroken fuel feeding opening is furnished across the front of the furnace, thereby permitting-a feeding ofthe fuel to several adj oining stoker grate sections through one and the same opening, theadjoining sections being arranged-side-by side and preferably inclined directly from the fuel opening downwardly and rearwa'rdly of the fire chamber,and the grate inembers being actuable to cooperate with the inclined nature of the grate in: shifting the fuel in a gradual and satisfactory manner throughout the length of the firechamber to a dumping point, provided for clinkers, etc. at the back of the fire chamber.

In my prior, but still copending application, I have disclosed improved supporting means for the grate, and an object of the present invention has beento further perfect said supporting means in a manner lending to the simplicity, better assembling of the parts, improved functioning of said parts permitting expansion and contraction thereof without impediment from rigid or bolted connections as inthe-earlier instance; andthearrangeinent of the long fuel feeding opening so that "the same is usable .in connection with my improved feed hopper setwiiorth ininy copendingapplication, filed 1920. SerialNo. 390,099.

August 29, 1919', Serial No. 320,605, without creating obstructing interference with the use of long actuating levers quite desirable to be employed as part of the actuating means for the grate members.

It will be appreciated that where the fuel feeding opening is in length coincident with the width of the assembledadjoining grate sections, as in my first above mentioned application, it is difficult, if not impossible, to afford sufiicient space at the front of the furnace and beyond the ends of the feed opening to allow for the provision of long upwardly projecting handles or levers, and such an arrangement prevents the employment of a feed hopper unless some breale. down or sectional arrangement of levers projecting unduly forwardly ofthe furnace to a point to escape the hopper is utilized.

As distinguished from the foregoing, in my present construction, I still secure the advantages of the elongated fuel inlet opening and the use of a hopper feed in conjunction therewith, while at the same time allowing for the use of long grate actuating levers located at the ends of the hopper and normally confined within the space defined'by the front wall of the furnace and theouter or front plane of the hopper.

The improved features herein outlined as well as others appealingv topersons skilled in the art to which the invention relates will be apparent from the detaileddescription hereinafter contained when read in connection with the accompanying drawings, forming part hereof, and wherein the preferred embodiment of the invention is illustrated.

In the drawings:

Figure 1 is a perspective view of the improved grate associated with the furnace, the latter being illustrated inerelyin a fragmentary way to render the disclosure clear,

only one of the supporting cplumns of the front brick work being shown.

Figure 2 is a perspective view illustrating the forward support for a pair of adjoining grate sections and the manner of associating and securing the same in relation to the frontplate or wall of the furnace and the fuel feed-opening in the latter.

Figure-3 is a longitudinal sectional view showingthe apparatus of Figure l. with the hopperapplied atthe frontgof the same;

Figure 4 is a horizontal sectional view looking down upon thehopper. and thegrato supporting: means of Figure :3.

Figure 5 is a detail perspective view illustrating a modification wherein the forward or initial fuel feeding bars are of the same length as the grate bars succeeding the same and also illustrating a modification of the adjoining fire brick sections for the front plate, only one of the supporting colun'ins of the front brick work being shown.

Figure 6 is a detail vertical sectional view showing the manner of forming the lower ends of the brick columns of the modification illustrated in Fig. 5.

Figure 7 is a fragmental transverse tional view of still another wherein separate fuel feeding open gs provided and special. protecting lire bri -a members used to preserve the end and divid ing portions of the front plate; and

Figure 8 is a vertical detail section looking toward the front plate to show the fire proof protecting members of t e modification disclosed in Fig. '4'.

Fig. 9 is a perspective of the hopper used at the fuel opening.

Referring more specifically to the drawings wherein like reference letters designate corresponding parts in the several views. it represents the bridge wall of a furnace, ll the side walls, C the front brick or arch work above the fuel feed opening D in the front plate or wall E, and F represents the floor or bottom of the ash or other pit located below the grate.

At a suitable place at the rear of the fire box and supported by embedding the ends thereof in the brick or other masonry walls B, I secure a horizontally rranged grate supporting bar G, the sa. occupying a plane substantially below th lower edge of the fuel feed opening 1). his bar ".7: is formed with slots in its upper surface doing nated H and I, the former being oinarrow width and arranged near the opposite ends of the bar G. and the latter being of double width located centrally of the bar for pro poses as will soon appear.

On the front plate or wall E of the fu nace, I provide another grate supporting bar of a peculiarly novel formation best seen in Fig. 2, the same being in the nature of a casting having a flat body or web portion J adapted to be firmly secured to the inner face of the front plate E of the furnace by suitable means, conveniently nuts and bolts K. The bar under immediate con. .deration is preferably a casting and the web 1 thereof is strongly reinforced by an inwardly directed flange L rcsul: in an angle-bar formation at the ODPOSLLC end portions of the web J. the inwardlv directed flange l1 being formed into U-shape as at Ll: (thickened at its base m) at its middle portion to provit e a recess complemental to the correspoxulinw ly located recess I in the rear bar G. it observed at this point that the front SHPP JYL-- modification ing bar is preferably located in a plane well upwardly from the plane of the rear bar G.

Inwardly extending bases or platforms I"? constitute integral portions of the forward bar, these base portions being in the plane of the flange L and in turn surrounded by upwardly projecting inner side and end. flanges 17, and having outer depending flanges O, the rear edges 0 of which abut the inner face of the front plate E to assist in maintaining the forward supporting bar in place and to brace the platforms N to thereby assist the same in the supporting weight of masonry imposed thereon. Projectii outwardly from the inner lower corners the depending flanges 0 are somewhat Z? shaped continuations, the terminal pUil lOl'ls' P of which are adapted to be received into the brick or other masonry side walls 15. previously mentioned, the other or lower terminal portions 7) and tne association thereof with the flanges O leaving recesses complemental to, that is of a size and aligned with, the outer slots H in the rear supporting bar Gr.

R indicates the outside longitudinal supports and S the inside adjoining supports for the correspondingly adjoining sets of grate and stoking members T and dump ing grate members T, the supporting member D and ti having end portions fittin the aln 16d slots and recesses HQ,, ll\'r. rcspectively. 'lhroughout the specification and claims where I refer to adjoining sets or adjoining series of grate sections 1 wish it understood that I use a plurality of serie. of grate sections the series going forward to make up a complete grate structure and the sections of adjacent series or sets bc arranged side by side. The upper inn: edges of the members R and S have o1 )(ir topped recesses z in which pivot extensions or pintles 2% rock. The dumping members l" are manipulated either alternately or gcther by means of depending extensions H suitably linked to operating levers U. The grate and stoking members T are operated either in unison or alternately both with reference to each other and with reference to the two series of the adjoining sections by means of depending extensions a suitably connected together as the 1/? and linked to levers U also in advance of the front of tin furnace. Of course, it will be seen that the dumping grate sections T are pivoted re versely to the manner of pivoting the grahand stoking sections; in other words, the pivoted. ends of the dumping members are arranged back to back, so to speak, with the pivots of the endmost stoking members.

In advance of the grate and stoking members T are arranged similarly pivoted fuel supporting and feed members V. the forward edges of which meet the flanges L on the front supporting bar or ledge and ex.-

l ill a pair of adjoining separate openings are illustrated at 16, the supporting ledge be ing the same as in that form of the invention illustrated in Figures 5 and 6 and the fire proof protection being also the same, with the addition of a similar intermediate detachable fireproofing member, indicated at 17, to protect the dividing portion of the front plate intermediate of the two fuel openings 16. In this instance, merely cited to show the adaptability of the present invention to various types of furnaces, it is to be remembered that the idea of the front feeding hopper may be also here employed, as suggested at dotted lines where separate hoppers after the fashion of the hopper of my copending case, Serial No. 320605, are indicated.

In all of the embodiments of the invention herein disclosed, it is to be observed that relatively fine slits are illustrated as at 19 in the front feeding bars which will enable a small quantity of air to be supplied to the fuel at these points, but in instances these slits may be dispensed with and these particular members of the grate formed solid throughout.

hat I claim is:

1. In a furnace, the combination of its front wall having interior grate supporting means thereon, a rear support for the grate, adjoining series of grate sections located be tween and operatively associated with said supports, the sections of one series being arranged beside the sections of the adjoining series, the front wall of the furnace having an elongated uninterrupted fuel admission opening common to the adjoining series of grate sections and of a length slightly short of the combined width of the adjoining sections, fuel feeding members whose combined length is substantially that of said opening having the forward por tions thereof terminating in immediate proximity to said opening to directly receive the fuel passed through said opening, and fire proof protecting columns at the ends of the fuel feeding members and between the front wall of the furnace and the immediately adjacent grate sections.

2. In a furnace, the combination of its front wall having an elongated fuel admission opening, adjacent series of grate sections. the sections of one series being arranged by the side of the sections of the adjacent series and the fuel opening being common to the series of grate sections, feeding members located between said opening and the grate sections of a combined length approximately that of said opening and less than the combined length of the immediately adjacent grate sections, fire proof columns located at the ends of the feeding members and between the front wall of the furnace and the grate sections, and means outside of the said front wall operatively associated with the grate sections to operate the same, said means being arranged laterally of said opening.

3. In a furnace, the combination of its front Wall having an elongated fuel admis sion opening, adjacent series of grate sections, the fuel opening being common to the adjacent series of grate sections and the sections of adjacent series being arranged side by side, feeding means located between said opening and grate sections, said opening and feeding means being of a length short of the combined width of adjoining grate sections, fire proof protecting means located at the ends of said feeding means and between said front wall and the adjacent grate sections, means outside of said front wall operatively associated with the grate sections to actuate the same, said means being arranged at one side of the opening, and a front feeder associated with said opening in position so as not to interfere with the actuating means.

4. A grate supporting ledge comprising a web portion adapted to be secured to the front wall of a furnace and carrying at its ends inwardly projecting supporting platforms having depending flanges at their outer ends, and spaced upwardly projecting portions secured to said flanges and forming therewith upwardly opening recesses, substantially as described.

5. A grate supporting ledge comprising a web portion adapted to be secured to the front wall of a furnace and carrying at its ends inwardly projecting supporting plat forms having depending flanges at their outer ends, and spaced upwardly projecting portions secured to said flanges and forming therewith upwardly opening recesses, said upwardly projecting portions having longitudinally offset extensions, substantially as described.

6. A grate supporting ledge comprising aweb portion adapted to be secured to the front wall of a furnace and carrying at its ends inwardly projecting supporting p1atforms, upwardly opening recessed portions located beyond said platforms and an upwardly opening recessed portion on the web portion between said platforms.

7. A grate supporting ledge comprising a web portion adapted to be secured to the front wall of a furnace and carrying at its ends supporting platforms projecting 1nwardly in a downwardly inclined direction therefrom, the platform having upwardly directed forward flanges.

8. In a furnace including side walls, a front plate having a fuel feeding opening therein, and a bridge wall, a support secured to the bridge wall, a supporting ledege secured to the front plate, said supporting ledge comprising a web portion secured to the front plate and having adjacent its ends inwardly extending supporting platforms, a feeding grate carried by and between the support on the bridge wall and the ledge on the front plate, and a front fire wall supported on the platforms.

9. In a furnace including side walls, a front plate having a fuel feeding opening therein, and a bridge wall, a support secured to the bridge wall, a supporting ledge secured to the front plate, said supporting ledge comprising a web portion secured to the front plate and having adjacent its ends inwardly extending supporting platforms having upwardly extending flanges, a feed ing grate carried by and between the support on the bridge wall and the ledge on the front plate, and a front fire wall supported on the platforms.

10. In a furnace including side walls, a front plate having a fuel feeding opening therein, and a bridge Wall, a support secured to the bridge wall, a supporting ledge secured to the frnot plate, said supporting ledge comprising a web portion secured to the front plate and having adjacent its ends inwardly extending supporting platforms, each of said platforms having an upwardly extending flange on that side edge adjacent the fuel feeding opening and that end removed from the front plate, a feeding grate carried by and between the support on the bridge wall and the ledge on the front plate, and a fire wall supported on the platforms.

In testimony whereof I hereunto aflix my signature.

VASIL MACKAY. 

